Sealing hoop, connecting fitting and pipeline

Abstract

The utility model relates to the technical field of drainage pipelines, in particular to a sealing hoop, a connecting fitting and a pipeline, the sealing hoop comprises a first connecting ring, a second connecting ring and a first sealing piece, arc-shaped grooves are formed in the inner surfaces of the first connecting ring, the second connecting ring and the first sealing piece, and one end of the first connecting ring is rotationally connected with one end of the second connecting ring; the other end of the arc-shaped groove is detachably connected with the second connecting ring, the first sealing pieces are arranged in the arc-shaped groove, and trapezoidal grooves are formed in the first sealing pieces; the connecting fitting further comprises a pressing mechanism, a first flange and a second flange, the first flange and the second flange are arranged in the sealing hoop and abut against the first sealing piece, the end of the first flange abuts against the end of the second flange, one end of the pressing mechanism is connected with the first flange in an inserted mode, and the other end of the pressing mechanism abuts against the second flange. The pipeline comprises a connecting fitting and two pipelines, and the ends of the two pipelines are connected through the connecting fitting. According to the utility model, good sealing performance can be ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of drainage pipes, and more specifically, to a sealing clamp, connecting fittings, and pipeline. Background Technology

[0002] Currently, water supply and drainage operations are mainly carried out through various types of plastic pipes. Existing drainage pipes are plastic pipe fittings made of rigid polyvinyl chloride (PVC-U) resin as the main raw material through extrusion or injection molding. PVC-U pipe fittings have advantages such as light weight, corrosion resistance, low water flow resistance, energy saving, rapid installation, and low cost. They have been widely promoted and applied, with significant benefits. They are widely used in urban tap water transmission projects, building internal and external water supply projects, industrial and mining enterprise water supply projects, underground fire water supply projects, farmland water conservancy irrigation projects, garden and horticulture greening water supply projects, aquaculture water supply and drainage projects, etc., and have achieved good economic and social benefits.

[0003] Although PVC-U pipe fittings can meet the cost-saving needs of water supply and drainage operations, the flow of water through the pipes often generates a significant amount of noise, causing inconvenience and disruption to daily life. To address this issue, the industry has begun using composite noise-reducing PVC-U pipes. These pipes are designed to effectively reduce noise and minimize the impact on the environment and people's lives. However, during the installation of these composite noise-reducing PVC-U pipes, insufficient sealing at the joints can be a problem. Flange connections, as a common connection method, are crucial for the stable operation and safety of the entire pipeline system. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of insufficient sealing at the connection of existing PVC-U pipe fittings, and to provide a sealing clamp, connecting accessories and pipeline that can ensure good sealing performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A sealing clamp is provided, comprising a first connecting ring and a second connecting ring, both of which are semi-circular arc structures and have arc grooves on their inner surfaces, and a plurality of first sealing members with arc structures. One end of the first connecting ring is rotatably connected to one end of the second connecting ring, and the other end of the first connecting ring is detachably connected to the other end of the second connecting ring. A plurality of first sealing members are sequentially installed in the arc grooves, and a trapezoidal groove is formed inside the first sealing member along its length.

[0007] The first connecting ring of this invention is rotatably connected to one end of the second connecting ring, and its other end is detachably connected to the other end of the second connecting ring. Both the first and second connecting rings have arc-shaped grooves on their inner surfaces. Several first sealing elements are sequentially installed in the arc-shaped grooves. The flange is installed inside the first and second connecting rings. The trapezoidal groove of the first sealing element abuts against the flange. The trapezoidal groove design helps to fix the flange, ensuring that it is always in the correct position, reducing noise, and increasing the contact area between the first sealing element and the flange, thereby improving the sealing effect. It can also adapt to the deformation of the first sealing element caused by pressure changes, ensuring that it maintains good sealing performance under different working pressures.

[0008] Furthermore, there are at least two of the first sealing elements, respectively installed on the first connecting ring and the second connecting ring. The installation on the first connecting ring and the second connecting ring further ensures the sealing performance of the pipe connection.

[0009] Furthermore, it also includes a first fixing plate and a second fixing plate, both with through holes, and a fixing assembly. One end of the first connecting ring is hinged to the second connecting ring via a hinge, and the other end is fixedly connected to the first fixing plate. The second fixing plate is installed at the end of the second connecting ring away from the hinge. The first fixing plate and the second fixing plate are connected by the fixing assembly. The fact that one end of the first connecting ring is hinged to the second connecting ring, and the other end is connected to the second connecting ring via the first fixing plate, the second fixing plate, and the fixing assembly, not only simplifies the installation process but also improves the stability of the connection.

[0010] This utility model also provides a connecting accessory, including the sealing clamp, a pressing mechanism, a first flange and a second flange, both of which have circular ring structures at their ends. The ends of the first flange and the second flange are both installed inside the sealing clamp. The outer sides of the first flange and the second flange abut against the first sealing element, and the ends of the first flange and the second flange abut against each other. One end of the pressing mechanism is inserted into the first flange, and the other end abuts against the second flange.

[0011] The first and second flanges of this utility model are installed inside the sealing clamp. The first flange and the second flange abut against each other. During installation, one end of the clamping mechanism is inserted into the first flange, and the other end protrudes from the first flange and abuts against the second flange. The second flange and the clamping mechanism squeeze each other, causing the clamping mechanism to deform and improve the sealing performance.

[0012] Furthermore, the clamping mechanism includes a second seal and a compression assembly. The second seal is a ring structure, installed between the first flange and the compression assembly, with the outer side of the second seal abutting against the inner side of the second flange. One end of the compression assembly is inserted into the first flange, and the other end abuts against the second flange. The compression of the second seal between the first flange and the compression assembly during installation causes deformation of the second seal. The deformed second seal abuts more tightly against the inner side of the second flange, resulting in better sealing. Simultaneously, the second seal reduces noise at the connection point.

[0013] Furthermore, the extrusion assembly includes an elastic element and an extrusion tube. The extrusion tube includes an abutment portion and a connecting portion connected to each other. The outer diameter of the abutment portion is larger than the outer diameter of the connecting portion. The elastic element is sleeved on the connecting portion, with one end abutting against the first flange and the other end abutting against one end of the abutment portion. The other end of the abutment portion abuts against the second flange. One end of the second sealing element is connected to the first flange, and the other end is connected to the abutment portion. The elastic element is sleeved on the connecting portion, with one end abutting against the first flange and the other end abutting against the abutment portion. The abutment portion abuts against the second flange, compressing the elastic element and the second sealing element. This causes the second sealing element to be compressed and folded outward, making the connection between the second sealing element and the second flange tighter. Simultaneously, after installation, the elastic element continuously provides elastic force to the abutment portion, ensuring a tight connection between the abutment portion and the second flange, preventing loosening.

[0014] Furthermore, the system also includes several guide assemblies, which are circumferentially installed inside the first flange. Each guide assembly includes a guide member, a first rotating plate, and a second rotating plate. One end of the first rotating plate is rotatably connected to the first flange, and the other end is rotatably connected to the guide member. One end of the second rotating plate is rotatably connected to the extrusion assembly, and the other end is rotatably connected to the guide member. The outer side of the guide member is connected to the second sealing member. Both the first and second rotating plates are rotatably connected to the guide member. During installation, both the first and second rotating plates rotate relative to the guide member, causing the guide member to move outward. The outer side of the guide member connects to the second sealing member. The movement of the guide member ensures that when the second sealing member deforms, these protrusions protrude outward, making the connection between the second sealing member and the second flange tighter.

[0015] Furthermore, the guide assembly also includes several first connecting plates and several second connecting plates. One end of the first connecting plate is connected to the first flange, and the other end is rotatably connected to the first rotating plate. One end of the second connecting plate is connected to the extrusion assembly, and the other end is rotatably connected to the second rotating plate. During installation, the first rotating plate rotates relative to the first connecting plate and the guide member, and the second rotating plate rotates relative to the second connecting plate and the guide member. The first rotating plate and the second rotating plate move closer to each other, causing the guide member to move outward, ensuring that the second seal folds outward and protrudes when deformed, making the connection between the second seal and the second flange tighter.

[0016] This utility model also provides a pipeline, including a connecting fitting and two pipes connected by the connecting fitting. The two pipes are connected via the connecting fitting, resulting in good sealing.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The sealing clamp of this utility model is easy and quick to install. The first sealing element not only effectively reduces noise, but also ensures the sealing clamp is connected to the flange and has a tight seal. The first flange, the second flange and the clamping mechanism ensure the sealing of the connection and prevent leakage.

[0019] 1. In this utility model, one end of the first connecting ring is rotatably connected to one end of the second connecting ring, and the other end is detachably connected to the other end of the second connecting ring. Both the inner surfaces of the first and second connecting rings are provided with arc-shaped grooves. The first sealing element is installed in the arc-shaped groove, and the flange is installed inside the first and second connecting rings. The trapezoidal groove of the first sealing element abuts against the flange. The design of the trapezoidal groove helps to fix the flange, ensuring that it is always kept in the correct position, reducing noise, and increasing the contact area between the first sealing element and the flange, thereby improving the sealing effect. It can also adapt to the deformation of the first sealing element caused by pressure changes, ensuring that it can maintain good sealing performance under different working pressures. It can also reduce the wear of the sealing ring during the installation and disassembly of this utility model, extending the service life of the device.

[0020] 2. The first flange and the second flange of this utility model are installed inside the sealing clamp. The first flange and the second flange abut against each other. During installation, one end of the clamping mechanism is connected to the pipeline and the other end abuts against the second flange. The second flange and the clamping mechanism squeeze each other, causing the clamping mechanism to deform and improve the sealing performance. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the sealing clamp and connecting accessories of this utility model;

[0022] Figure 2This is a schematic diagram of the structure of the first sealing element of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the connecting accessory of this utility model;

[0024] Figure 4 for Figure 3 AA section view;

[0025] Figure 5 for Figure 4 Enlarged view of point B.

[0026] In the attached diagram: 100, sealing clamp; 110, first connecting ring; 120, second connecting ring; 130, first sealing element; 151, first fixing plate; 152, second fixing plate; 153, bolt; 154, nut; 160, hinge; 200, clamping mechanism; 210, second sealing element; 220, extrusion assembly; 221, elastic element; 222, extrusion tube; 2221, abutment part; 2222, connecting part; 300, first flange; 400, second flange; 510, guide element; 520, first rotating plate; 530, second rotating plate; 540, first connecting plate; 550, second connecting plate. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] like Figures 1 to 2The first embodiment of the sealing clamp of this utility model is shown. This utility model includes a first connecting ring 110, a second connecting ring 120, and several first sealing members 130 with arc-shaped grooves on their inner surfaces, all of which are semi-circular arc structures. One end of the first connecting ring 110 is rotatably connected to one end of the second connecting ring 120, and the other end of the first connecting ring 110 is detachably connected to the other end of the second connecting ring 120. Several first sealing members 130 are sequentially installed in the arc-shaped grooves. The first sealing member 130 has a trapezoidal groove along its length inside. One end of the first connecting ring 110 is rotatably connected to one end of the second connecting ring 120, and the other end is detachably connected to the other end of the second connecting ring 120. Both the inner surfaces of the first connecting ring 110 and the second connecting ring 120 are provided with arc-shaped grooves. Several first sealing elements 130 are sequentially installed within these arc-shaped grooves. A flange is installed inside the first connecting ring 110 and the second connecting ring 120. The trapezoidal groove of the first sealing element 130 abuts against the flange. The trapezoidal groove design helps to fix the flange, ensuring it remains in the correct position, reducing noise, and increasing the contact area between the first sealing element 130 and the flange, thereby improving the sealing effect. It can also adapt to the deformation of the first sealing element 130 due to pressure changes, ensuring good sealing performance under different working pressures. Furthermore, it reduces wear on the sealing ring during installation and disassembly, extending the service life of the device. In this utility model, one end of the first connecting ring 110 is rotatably connected to the second connecting ring 120, and the other end is detachably connected to the second connecting ring 120. The connection can be made using snap-fit, pin, through-hole bolt 153 after opening a through hole, screw, or latch connection. In this embodiment, there are four first sealing elements 130, two of which are installed on the first connecting ring 110 and the other two on the second connecting ring 120. However, this is not a limitation, and the selection can be made according to actual needs.

[0031] This utility model has at least two first sealing elements 130, which are respectively installed on the first connecting ring 110 and the second connecting ring 120. The installation on the first connecting ring 110 and the second connecting ring 120 further ensures the sealing performance of the pipe connection. In this embodiment, four first sealing elements 130 are selected, installed in pairs on the first connecting ring 110 and the second connecting ring 120, but this is not a limitation; the installation position and number of the first sealing elements 130 can be selected according to actual needs.

[0032] This utility model also includes a first fixing plate 151, a second fixing plate 152, and a fixing assembly, each having through holes. One end of the first connecting ring 110 is hinged to the second connecting ring 120 via a hinge 160, and the other end is fixedly connected to the first fixing plate 151. The second fixing plate 152 is installed at the end of the second connecting ring 120 away from the hinge 160. The first fixing plate 151 and the second fixing plate 152 are connected by the fixing assembly. The fact that one end of the first connecting ring 110 is hinged to the second connecting ring 120 via the hinge 160, and the other end is connected to the second connecting ring 120 via the first fixing plate 151, the second fixing plate 152, and the fixing assembly, not only simplifies the installation process but also improves the stability of the connection.

[0033] The fixing component of this utility model includes a bolt 153 and a nut 154. The bolt 153 passes through the through holes of the first fixing plate 151 and the second fixing plate 152 and is threadedly connected to the nut 154. The threaded connection between the bolt 153 and the nut 154 allows the connection between the first connecting ring 110 and the second connecting ring 120 to be easily disassembled and reassembled when needed, which is convenient for maintenance and repair, and also has good reusability. The threaded connection has a self-locking characteristic, that is, the connection will not loosen on its own when subjected to vibration or impact, and the threaded connection allows for fine adjustment to adapt to flanges of different specifications. The threaded connection can adapt to different materials and sizes and is suitable for various scenarios and environments. In addition, it can be manufactured by various machining methods such as lathes and milling machines, and the processing is relatively simple.

[0034] The working principle of the sealing clamp 100 in this embodiment is as follows: one end of the first connecting ring 110 is hinged to one end of the second connecting ring 120, and the other end of the first connecting ring 110 is detachably connected to the second connecting ring 120 through the first fixing plate 151, the second fixing plate 152 and the fixing assembly. The inner surfaces of the first connecting ring 110 and the second connecting ring 120 are provided with arc-shaped grooves. The first sealing element 130 is installed in the arc-shaped groove. The flange is installed inside the first connecting ring 110 and the second connecting ring 120. The trapezoidal groove of the first sealing element 130 abuts against the flange. The design of the trapezoidal groove helps to fix the flange, ensure that it is always in the correct position, reduce noise, and increase the contact area between the first sealing element 130 and the flange, thereby improving the sealing effect. The sealing clamp 100 can connect with the flange while ensuring the sealing of the connection.

[0035] Example 2

[0036] like Figures 3 to 4The diagram shows a first embodiment of the connecting fitting of this utility model. This utility model includes a sealing clamp 100, a clamping mechanism 200, and a first flange 300 and a second flange 400, both with annular ends. The ends of the first flange 300 and the second flange 400 are both installed inside the sealing clamp 100. The outer sides of both the first flange 300 and the second flange 400 abut against the first sealing element 130, with the ends of the first flange 300 and the second flange 400 abutting against each other. One end of the clamping mechanism 200 is inserted into the first flange 300, and the other end abuts against the second flange 400. During installation, one end of the clamping mechanism 200 is inserted into the first flange 300, and the other end protrudes from the first flange 300 and abuts against the second flange 400. The second flange 400 and the clamping mechanism 200 press against each other, causing the clamping mechanism 200 to deform, resulting in better sealing.

[0037] The clamping mechanism 200 of this utility model includes a second sealing element 210 and a compression assembly 220. The second sealing element 210 is a ring structure, which is installed between the first flange 300 and the compression assembly 220, with the outer side of the second sealing element 210 abutting against the inner side of the second flange 400. One end of the compression assembly 220 is inserted into the first flange 300, and the other end abuts against the second flange 400. The compression of the compression assembly 220 against the second flange 400 during installation causes the second sealing element 210 to deform. After deformation, the second sealing element 210 abuts against the inner side of the second flange 400 more tightly, resulting in better sealing. At the same time, the second sealing element 210 can reduce noise at the connection.

[0038] The extrusion assembly 220 of this utility model includes an elastic element 221 and an extrusion tube 222. The extrusion tube 222 includes an abutment portion 2221 and a connecting portion 2222 connected to each other. The outer diameter of the abutment portion 2221 is larger than the outer diameter of the connecting portion 2222. The elastic element 221 is sleeved on the connecting portion 2222, with one end abutting against the first flange 300 and the other end abutting against one end of the abutment portion 2221. The other end of the abutment portion 2221 abuts against the second flange 400. One end of the second sealing element 210 is connected to the first flange 300, and the other end is connected to the abutment portion 2221. The elastic element 221 is sleeved on the connecting portion 2222, with one end abutting against the pipe and the other end abutting against the abutment portion 2221. The abutment portion 2221 abuts against the second flange 400. The elastic element 221 and the second sealing element 210 are compressed, causing the second sealing element 210 to fold outwards, resulting in a tighter connection between the second sealing element 210 and the second flange 400. Simultaneously, after installation, the elastic element 221 continuously provides elastic force to the abutment portion 2221, ensuring a tight connection between the abutment portion 2221 and the second flange 400, preventing loosening. In this embodiment, a spring is selected as the elastic element 221, but it is not limited to this; elastic steel plates, air bladders, rubber, etc., can also be used as substitutes, and the selection should be based on actual needs.

[0039] The working principle of the connecting fitting in this embodiment is as follows: The first flange 300 and the second flange 400 are installed inside the sealing clamp 100. The first flange 300 and the second flange 400 abut against each other. During installation, one end of the clamping mechanism 200 is connected to the pipeline, and the other end abuts against the second flange 400. The second flange 400 abuts against the abutment part 2221, which compresses the elastic member 221 sleeved on the connecting part 2222. At the same time, the second sealing member 210 is compressed and folds outward, making the connection between the second sealing member 210 and the second flange 400 tighter. Meanwhile, after installation, the elastic member 221 continuously provides elastic force to the abutment part 2221 to ensure that the connection between the abutment part 2221 and the second flange 400 is tight and not easy to loosen.

[0040] Example 3

[0041] like Figure 5The following is a second embodiment of the connecting fitting of this utility model. This embodiment is similar to the second embodiment, except that the utility model further includes several guide components. The several guide components are installed circumferentially inside the first flange 300. The guide components include a guide member 510, a first rotating plate 520 and a second rotating plate 530. One end of the first rotating plate 520 is rotatably connected to the first flange 300 and the other end is rotatably connected to the guide member 510. One end of the second rotating plate 530 is rotatably connected to the pressing component 220 and the other end is rotatably connected to the guide member 510. The outer side of the guide member 510 is connected to the second sealing member 210. The first rotating plate 520 and the second rotating plate 530 are both rotatably connected to the guide member 510. During installation, the first rotating plate 520 and the second rotating plate 530 rotate relative to the guide member 510, causing the guide member 510 to move outward. The outer side of the guide member 510 is connected to the second sealing member 210. The movement of the guide member 510 ensures that when the second sealing member 210 deforms, these protrusions will protrude outward, making the connection between the second sealing member 210 and the second flange 400 tighter.

[0042] The guide assembly of this utility model also includes several first connecting plates 540 and several second connecting plates 550. One end of the first connecting plate 540 is connected to the first flange 300, and the other end is rotatably connected to the first rotating plate 520. One end of the second connecting plate 550 is connected to the extrusion assembly 220, and the other end is rotatably connected to the second rotating plate 530. During installation, the first rotating plate 520 rotates relative to the first connecting plate 540 and the guide member 510, and the second rotating plate 530 rotates relative to the second connecting plate 550 and the guide member 510. The first rotating plate 520 and the second rotating plate 530 move closer to each other, causing the guide member 510 to move outward, ensuring that the second sealing member 210 folds and protrudes outward when deformed, making the connection between the second sealing member 210 and the second flange 400 tighter. In this embodiment, there are two first connecting plates 540 and two connecting plates 550, but it is not limited to this.

[0043] Example 4

[0044] This utility model discloses a first embodiment of a pipeline, which includes a connecting fitting and two pipes connected by the connecting fitting. The connection between the two pipes via the connecting fitting provides good sealing.

[0045] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sealing clamp, characterized in that, The device includes a first connecting ring (110) and a second connecting ring (120), both of which are semi-circular arc structures and have arc grooves on their inner surfaces, and several first sealing elements (130) with arc structures. One end of the first connecting ring (110) is rotatably connected to one end of the second connecting ring (120), and its other end is detachably connected to the other end of the second connecting ring (120). Several first sealing elements (130) are sequentially installed in the arc grooves. The first sealing element (130) has a trapezoidal groove along its length inside.

2. The sealing clamp according to claim 1, characterized in that, There are at least two first seals (130), which are respectively installed on the first connecting ring (110) and the second connecting ring (120).

3. The sealing clamp according to claim 1, characterized in that, It also includes a first fixing plate (151) and a second fixing plate (152) both having through holes, and a fixing assembly. One end of the first connecting ring (110) is hinged to the second connecting ring (120) via a hinge (160), and the other end is fixedly connected to the first fixing plate (151). The second fixing plate (152) is installed at the end of the second connecting ring (120) away from the hinge (160). The first fixing plate (151) and the second fixing plate (152) are connected by the fixing assembly.

4. A connecting accessory, characterized in that, The device includes the sealing clamp (100) as described in any one of claims 1 to 3, and further includes a clamping mechanism (200), a first flange (300) and a second flange (400) with circular ring structures at both ends. The ends of the first flange (300) and the second flange (400) are both installed inside the sealing clamp (100). The outer sides of the first flange (300) and the second flange (400) abut against the first sealing element (130), and the end of the first flange (300) abuts against the end of the second flange (400). One end of the clamping mechanism (200) is inserted into the first flange (300), and the other end abuts against the second flange (400).

5. The connecting fitting according to claim 4, characterized in that, The pressing mechanism (200) includes a second seal (210) and a pressing assembly (220). The second seal (210) is a ring structure and is installed between the first flange (300) and the pressing assembly (220). The outer side of the second seal (210) abuts against the inner side of the second flange (400). One end of the pressing assembly (220) is inserted into the first flange (300), and the other end abuts against the second flange (400).

6. The connecting fitting according to claim 5, characterized in that, The extrusion assembly (220) includes an elastic element (221) and an extrusion tube (222). The extrusion tube (222) includes an abutment portion (2221) and a connecting portion (2222) connected to each other. The outer diameter of the abutment portion (2221) is larger than the outer diameter of the connecting portion (2222). The elastic element (221) is fitted onto the connecting portion (2222), and one end of the elastic element (221) abuts against the first flange (300), and the other end abuts against one end of the abutment portion (2221). The other end of the abutment portion (2221) abuts against the second flange (400). One end of the second sealing element (210) is connected to the first flange (300), and the other end is connected to the abutment portion (2221).

7. The connecting fitting according to claim 5, characterized in that, It also includes several guide components, which are circumferentially installed inside the first flange (300). The guide components include a guide member (510), a first rotating plate (520), and a second rotating plate (530). One end of the first rotating plate (520) is rotatably connected to the first flange (300), and the other end is rotatably connected to the guide member (510). One end of the second rotating plate (530) is rotatably connected to the extrusion assembly (220), and the other end is rotatably connected to the guide member (510). The outer side of the guide member (510) is connected to the second sealing member (210).

8. The connecting fitting according to claim 7, characterized in that, The guide assembly further includes a plurality of first connecting plates (540) and a plurality of second connecting plates (550). One end of the first connecting plate (540) is connected to the first flange (300), and the other end is rotatably connected to the first rotating plate (520). One end of the second connecting plate (550) is connected to the extrusion assembly (220), and the other end is rotatably connected to the second rotating plate (530).

9. A pipeline, characterized in that, The device includes the connecting fitting as described in any one of claims 4 to 8, and further includes two pipes connected by the connecting fitting.

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